I use an Omega DII for 35, 6x6 and 4x5. Just change out condensers and lenses as needed. Don't do that much MF, or for that matter 35mm anymore, so it usually stays set up for 4x5.
I wall mounted my DII. When I first got, I was in the old place where the darkroom had a drop-shelf arrangement below the enlarger to permit greater enlargements. It was a simple matter to install the DII in place of the Durst F60 (that it replaced).
When we moved to the new place I had to build a new darkroom, and opted to put the enlarger in a corner rather than up against a flat wall. I was able to provide enough headroom to avoid needing to do a drop shelf. But I had learned in the first installation that the DII tends to wobble a bit, so I arranged to brace the top of the column to the walls.